Stock for a 22 gallon

What are some fish / cuc stock ideas for a reef 22 gallon tank? I already have a Misbar Clownfish, a peppermint shrimp, a algae eating blenny, 5 hermits ( small red / blue legs and 3 scarlets

) and a bumble bee and turbo snail. I'm more so looking for fish ideas, and how many more fish? Also, do blennys count as taking up fish space or more so cuc space? He's already burrowed under a rock.